贵州某彩钼铅矿焙烧浸出工艺研究

Study on roasting-leaching process of a Guizhou wulfenite

为了回收贵州某钼矿中钼,通过化学分析、XRD、筛析等方法,研究原矿元素和矿物组成,以及粒度分布规律,采用焙烧-浸出工艺回收该矿石中的钼。结果表明,矿石中主要有价元素为钼,Mo O3含量为0.63%,金属矿物主要有菱锌矿、彩钼铅矿,非金属矿主要为白云石和重晶石,次要为石英,钼以细粒甚至微细粒嵌布为主,当矿石颗粒粒度为-0.045 mm时,钼的品位为0.72%,钼分布率高达66.61%。焙烧-浸出实验结果表明,当碳酸钠用量为7.0 g,焙烧时间为2 h,Na OH浓度为90 g/L,浸出时间为4 h时,钼的浸出率较好,为58.97%,焙烧-浸出工艺回收该彩钼铅矿中的钼是可行的。

Chemical element,mineral constituent,and grain fineness distribution were investigated by chemical analysis,XRD,screen analysis,and so on. Roasting-leaching process was explored to recovery molybdenum of a Guizhou wulfenite. The results showed that the valuable element of the raw ore was molybdenum,its content was 0. 63%. The metallic mineral consisted mainly of smithsonite and wulfenite,the non-metal ores were mainly dolomite and barite,the minor non-metal ores was quartz. The fine grain and micro-grained dissemination molybdenum dominated in the run of mine ore,the molybdenum content in particle granularity of-0. 045 mm was 0. 72%,its distribution rate was up to 66. 61%. The roastingleaching results showed that the molybdenum extraction reached 58. 97% at Na OH dosage of 7. 0 g,calcination time of 2 h,Na OH content of 90 g/L,and calcination time of 4 h Roasting-leaching process of a Guizhou wulfenite is feasible.